The Magnetic Structure of $E{r}_{2}T{i}_2{O}_7$

Abstract

We employ the previously published neutron scattering experiments\cite{1,2,3} to suggest that Er${}_2$Ti${}_2$O${}_7$ has a broken-symmetry multiple-{\bf q} state with tetragonal magnetic symmetry\cite{4}. The ordered moments do not appear to lie close to the crystal-field anticipated directions\cite{5} and we suggest that the low energy gapless mode, visible in specific-heat measurements\cite{6}, is not of the usual transverse isotropic Goldstone-mode type, but is longitudinal and is associated with the internal transfer of magnetism between distinct magnetic Bragg spots.

10 pages, 5 figures

References in corpus (4)

• Magnetic ordering in Gd2Sn2O7: the archetypal Heisenberg pyrochlore antiferromagnet
• Single-ion anisotropy in the gadolinium pyrochlores studied by an electron paramagnetic resonance
• Magnetic excitations in the XY-pyrochlore antiferromagnet Er${}_2$Ti${}_2$O${}_7$
• Field evolution of the magnetic structures in Er${}_2$Ti${}_2$O${}_7$ through the critical point

Cited by in corpus (2)

• Magnetic order, magnetic correlations and spin dynamics in the pyrochlore antiferromagnet Er2Ti2O7
• Low-temperature magnetisation process in the cubic pyrochlore quantum antiferromagnet, Er2Ti2O7